Realistic warfare where giant walking targets mounting direct fire guns acquire one another visually before firing loads of practically useless weapons over and over again into the same molten armor plating in a desperate effort to eventually punch through into internals and maybe destroy some internal components...
*cough* Anyway, yeah, can we please just analyze this as a game, not a simulation of fake warfare?
Actually, as much as I loved the tabletop, and the Amiga emulator of it I wouldn't mind playing a revamped, more modern BTech game. Easiest way? Increase all weapons ranges by a factor of 10. I wouldn't mind my LRMs locking at 10klicks, my PPCs hitting at 9km, and my medium beams riding out to 4 and a halfish kms.
And autocannon heat/jams arn't so hard to suspend your disbelief for when you consider the size and power of the ordinance. An AC20 round weights in the region of 100kg (10 rounds per metric ton, no?) The standard NATO MBT shell weighs in at 19kg IIRC (Thats puts it somewhere between an AC2 and AC5 shell).
As for the damage system, CBT system doesn't really apply well to any type of cockpit level simulation. Ideally I'd be very friendly to a modern system, using many different hitboxs all over the 'mech, where, for example, if you hit the heat vent hitbox on the torso of a MadCat MkII with a Gauss you'd definitely strip all the armour off and probably take that heat sink out, and as they're a network system it'd seriously effect cooling potential.
Further hits to that damaged hitbox would damage the engine and if more hits carried through they'd effect the gyro or even blow out through the back armour destroying JJs as it went! And if you got the right angle on the same un-armoured section you could punch through to the core without having to face the massively heavy CT hitboxs.
Sure it's not BTech, but it certainly would be fun kneecapping a hundred tonner with one well placed PPC blast sneaking in past their knee baffles

Point is, CBT rules work best of the tabletop game and as a guide to any 'mech sim, but I would be all for updating it for the sake of "realism".